A lot of reviews I've seen about the book are in agreement. She makes a lot of unsubstantiated, undocumented claims. She uses short quotes of just few words without context. A lot of people have expressed their disappointment. The title looks promising but Basham doesn't deliver a scholarly book.
It's hard not to argue the body of Christ has gone liberal and gone apostate in many cases; but it sounds like Basham is found wanting as an author on this subject. I've never read it and only have other people's reviews to go by. On Amazon a lot of people have reviewed it favorably, so there ya go.